Breitling Navitimer 01 43 Stainless Steel AB012012/BB01/447A

Breitling made the Navitimer for the Aircraft Owners and Pilots Association in 1952, and the slide rule still works out airspeed, fuel consumption and rate of climb. The calibre 01 was Breitling's first manufacture movement: a COSC-certified column-wheel chronograph with a vertical clutch and about 70 hours of power reserve. The black dial carries three silvery white subdials and a date between 4 and 5 o'clock, with lume on the hands and hour markers. It is rated to 30 m of water resistance.

The case is 14.25 mm thick. The AB012012/BB02/447A is the same watch with the Black Arabic dial, and the red gold RB012012/BA49 keeps this black dial. The Navitimer 01 46 (AB012721/BD09/443A) is the same black-dial steel chronograph on a bracelet at 46 mm and 14.5 mm.